We spent 5 days in Sozopol, one of our planned breaks from the van. We rented an apartment with great views of the Black Sea for a very reasonable price. Prices in Bulgaria are great.
We did have quite an adventure in old town of Sozopol. We were looking for the laundry service, made a wrong turn and ended up in the center of old town. We were stuck, didn't known how to get out and all roads were blocked with cars. With the help of a store merchant giving us some direction, then continued help along the way, we did make it. The streets are so narrow I don't know how the van fit.
The corner markets are everywhere. The produce is really good.